碩士 / 國立雲林科技大學 / 電子與資訊工程研究所 / 94 / Abstract – Radio signal will be distorted by channel noise and multi-path propagation phenomena during transmission. Estimation of channel response that provides a powerful mean to possibly equalize the distorted signals is a significant technology in modern communication systems. In this thesis, the pilot-aided OFDM system that makes use of some subcarrier to transmit the pilot symbols is considered. Channel responses in data subcarriers can be estimated from the responses of the pilot subcarriers by taking advantages of interpolator methods such as linear interpolator, WMSA, decision-directed channel predictor, robust channel interpolator and RBFN, and compares their performances.
The multi-band orthogonal frequency-division multiplexing ultra-wideband (MB-OFDM UWB), which is a candidate for IEEE 802.15.3a standard, is adopted as the simulation platform for performance evaluation of several channel estimation techniques. Under the constraint of an acceptable performance degradation, the isomorphism between fuzzy filters and RBFNs is utilized to achieve a low-complexity fuzzy-filter-assisted channel estimation.
| Identifer | oai:union.ndltd.org:TW/094YUNT5393002 |
| Date | January 2006 |
| Creators | Shun-Kai Chang, 張順凱 |
| Contributors | Jenn-Kaie Lain, 連振凱 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 85 |
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